/*************************************************************************
	> File Name: fun.h
	> Author: yas
	> Mail: rage_yas@hotmail.com
	> Created Time: Wed 14 May 2025 07:59:32 PM CST
 ************************************************************************/
extern void printCalendar(void);
extern int isLeapYear(int year);
extern int daysOfTheMonth(int year,int month);
extern int daysAfter1900(int year,int month);
extern int weekOfTheeFirstDay(int year,int month);
